排序方式： 共有13条查询结果，搜索用时 31 毫秒
11.
Grooves embossed into metallic substrates are proposed for self-aligned positioning of microoptical components like microlenses, optical fibers, glass rods with mirrors or filters, etc. As substrates, both ductile metals such as aluminum or copper, and hard alloys like CrNi steel can be used, which allows adaptation to requirements concerning thermal expansion coefficient, thermal conductance, hardness, mechanical strength, solderability, weldability, etc. Compared to other methods such as anisotropic etching in silicon substrates and LIGA, this technique offers more design flexibility and much lower investment cost and is well suited for medium production numbers. By the embossing process, the shape and surface quality of the embossing die are virtually transferred into the groove. The residual deviation between die and groove is in the order of 5-10 μm. The reproducibility is better than 5 μm, thus allowing self-aligned positioning with multimode fiber applications. Without reconditioning, several thousand embossing cycles can be made with the same die. The manufacturing of embossing dies is based on precision tooling techniques. The paper concludes with two application examples of optical communication components 相似文献
12.
It is shown that the coupling efficiency between partially coherent sources like LEDs and single-mode fibres can be calculated from near-field and far-field data. Good agreement with experimental results is found. 相似文献
13.
A method which allows numerical calculations of aberration-induced coupling loss with arbitrary coupling optics for single-mode fibers is discussed. It makes use of standard ray-tracing procedures and is applicable to coherent sources, like laser diodes (LDs), and partially coherent sources, such as light-emitting diodes (LEDs). Good agreement between calculated and measured coupling loss is found for LDs and edge-emitting LEDs. Some consequences of lens aberrations for coupling-lens design are discussed 相似文献